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Trellis-coded multidimensional fast frequency shift keying modulation by use of multistage decoding.

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Název: Trellis-coded multidimensional fast frequency shift keying modulation by use of multistage decoding.
Autoři: Saito, Hidetoshi, Kohno, Ryuji
Zdroj: Electronics & Communications in Japan, Part 3: Fundamental Electronic Science; Mar2000, Vol. 83 Issue 3, p70-83, 14p
Témata: ELECTRONIC modulation, DECODERS (Electronics), CODING theory, PHASE shift keying, ALGORITHMS, ELECTRIC circuits, ELECTRICAL engineering
Abstrakt: The case when the modulation index is 0.5 in continuous phase frequency shift keying (CPFSK) is called fast frequency shift keying (FFSK). In this paper, a trellis-coded multidimensional modulation scheme using FFSK is proposed. In implementing a multidimensional modulation system, the complexity of decoding associated with the maximum likelihood decoding based on a Viterbi algorithm and the trellis coding design become problematic. In particular, the latter is influenced significantly by the path memory of the Viterbi decoder and the size of the scale of the ACS circuit, becoming a big problem in implementing the system. Thus, in this scheme, the complexity of decoding is alleviated by constructing the trellis decoder from multiple finite state machines and using a pseudo-multistage decoding method. Thus, the search and optimization of codes capable of using this multistage decoding algorithm are investigated. The bit error rate performance of codes having less decoding complexity as compared with the past best decoding is evaluated by computer simulation and the efficacy of the proposed scheme is shown. ©1999 Scripta Technica, Electron Comm Jpn Pt 3, 83(3): 70–83, 2000 [ABSTRACT FROM AUTHOR]
Copyright of Electronics & Communications in Japan, Part 3: Fundamental Electronic Science is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Databáze: Complementary Index
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  Data: Trellis-coded multidimensional fast frequency shift keying modulation by use of multistage decoding.
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  Data: <searchLink fieldCode="AR" term="%22Saito%2C+Hidetoshi%22">Saito, Hidetoshi</searchLink><br /><searchLink fieldCode="AR" term="%22Kohno%2C+Ryuji%22">Kohno, Ryuji</searchLink>
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  Data: Electronics & Communications in Japan, Part 3: Fundamental Electronic Science; Mar2000, Vol. 83 Issue 3, p70-83, 14p
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  Data: <searchLink fieldCode="DE" term="%22ELECTRONIC+modulation%22">ELECTRONIC modulation</searchLink><br /><searchLink fieldCode="DE" term="%22DECODERS+%28Electronics%29%22">DECODERS (Electronics)</searchLink><br /><searchLink fieldCode="DE" term="%22CODING+theory%22">CODING theory</searchLink><br /><searchLink fieldCode="DE" term="%22PHASE+shift+keying%22">PHASE shift keying</searchLink><br /><searchLink fieldCode="DE" term="%22ALGORITHMS%22">ALGORITHMS</searchLink><br /><searchLink fieldCode="DE" term="%22ELECTRIC+circuits%22">ELECTRIC circuits</searchLink><br /><searchLink fieldCode="DE" term="%22ELECTRICAL+engineering%22">ELECTRICAL engineering</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The case when the modulation index is 0.5 in continuous phase frequency shift keying (CPFSK) is called fast frequency shift keying (FFSK). In this paper, a trellis-coded multidimensional modulation scheme using FFSK is proposed. In implementing a multidimensional modulation system, the complexity of decoding associated with the maximum likelihood decoding based on a Viterbi algorithm and the trellis coding design become problematic. In particular, the latter is influenced significantly by the path memory of the Viterbi decoder and the size of the scale of the ACS circuit, becoming a big problem in implementing the system. Thus, in this scheme, the complexity of decoding is alleviated by constructing the trellis decoder from multiple finite state machines and using a pseudo-multistage decoding method. Thus, the search and optimization of codes capable of using this multistage decoding algorithm are investigated. The bit error rate performance of codes having less decoding complexity as compared with the past best decoding is evaluated by computer simulation and the efficacy of the proposed scheme is shown. ©1999 Scripta Technica, Electron Comm Jpn Pt 3, 83(3): 70–83, 2000 [ABSTRACT FROM AUTHOR]
– Name: Abstract
  Label:
  Group: Ab
  Data: <i>Copyright of Electronics & Communications in Japan, Part 3: Fundamental Electronic Science is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1002/(SICI)1520-6440(200003)83:3<70::AID-ECJC8>3.0.CO;2-X
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      – Code: eng
        Text: English
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        PageCount: 14
        StartPage: 70
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      – SubjectFull: ELECTRONIC modulation
        Type: general
      – SubjectFull: DECODERS (Electronics)
        Type: general
      – SubjectFull: CODING theory
        Type: general
      – SubjectFull: PHASE shift keying
        Type: general
      – SubjectFull: ALGORITHMS
        Type: general
      – SubjectFull: ELECTRIC circuits
        Type: general
      – SubjectFull: ELECTRICAL engineering
        Type: general
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      – TitleFull: Trellis-coded multidimensional fast frequency shift keying modulation by use of multistage decoding.
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            NameFull: Saito, Hidetoshi
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            NameFull: Kohno, Ryuji
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            – D: 01
              M: 03
              Text: Mar2000
              Type: published
              Y: 2000
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              Value: 83
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            – TitleFull: Electronics & Communications in Japan, Part 3: Fundamental Electronic Science
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